A circular coil of radius 2 R is carrying current 'i'. The ratio of magnetic fields at the centre of the coil and at a point at a distance 6 R from the the centre of the coil on the axis of the coil is,
A
`10sqrt(10)`
B
`10sqrt(5)`
C
`20sqrt(5)`
D
`20sqrt(10)`
Text Solution
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The correct Answer is:
B
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